Your question: Why is a fan often fitted to an electric motor?

For AC induction motors, cooling air is usually circulated internally and externally by one or more fans mounted on the rotor shaft. … These are designed to keep the air flow close to the surface of the motor along its entire length, thus improving the cooling and self-cleaning of the ribs.

Is a fan an electric motor?

A fan is a powered machine used to create a flow of air. … Most fans are powered by electric motors, but other sources of power may be used, including hydraulic motors, handcranks, and internal combustion engines. Mechanically, a fan can be any revolving vane, or vanes used for producing currents of air.

What does a fan do?

Fans are used for circulating air in rooms and buildings; for cooling motors and transmissions; for cooling and drying people, materials, or products; for exhausting dust and noxious fumes; for conveying light materials; for forced draft in steam boilers; and in heating, ventilating, and air-conditioning systems.

What is the purpose of vent openings on a motor?

The rotor has fan blades that help move the air through the motor. One type of open enclosure is the ODP enclosure. In an ODP enclosure, the vent openings prevent liquids and solids that fall from above at angles up to 15° from vertical from entering the interior of the motor and damaging the operating components.

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What is fan motors?

Fan motors are very simple in construction. They consist of a synchronous or asynchronous electric motor, with a fan wheel of the associated shaft, and the connections for the lines. … All motors consist of a stator and contain a rotating rotor inside, which is surrounded by pole-pieces.

How do you run a fan without electricity?

If you want to turn a fan without electricity you can use water wheels, windmills, mechanical energy (as in a wind up clock), steam, or other mechanisms that transfer energy directly to the fan. An electric fan works with the help of an electric motor. A hub at the center of the fan is connected to metallic blades.

How important an electric fan at home or in a room?

Fans can help you keep your electricity bill lower (by up to 30%-40%) so that you can cool off and not have to worry about a large bill to pay. And even though a fan doesn’t actually decrease the temperature of the room, its draft of air will make it seem cooler and allow you to be comfortable.

How much cooler can a fan make you feel?

Ceiling fans create a wind chill effect that makes you feel cooler similar to an open window in a moving car. If you have a ceiling fan in a room with a temperature of 80 degrees, running the fan can create a wind chill effect that makes you feel as if the temperature is 72 degrees.

At what temperature do fans become ineffective?

When indoor air temperatures are cooler than about 95 °F:

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Fans do not cool the air, so air currents flowing over the body must be cooler than your body temperature to cool you down.

How many hours should an electric motor last?

Some manufacturers estimate 30,000 hours, while others state 40,000 hours. Some will say “it depends.” One thing is clear—a motor should last much longer with a conscientious motor systems maintenance plan than without one. Motor life can range from less than two years to several decades under particular circumstances.

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